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C# XPath id() not working?


C# XPath id() not working?

By : PatternMan
Date : January 02 2021, 06:48 AM
seems to work fine Use XmlDocument.GetElementById to get the XmlElement with the specified ID, e.g.:
code :


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XPath Expression must evaluate to a node-set with OK XPath Path (Tested with online XPath tester and Oxygen)

XPath Expression must evaluate to a node-set with OK XPath Path (Tested with online XPath tester and Oxygen)


By : user1574121
Date : March 29 2020, 07:55 AM
Hope this helps The program I am working on is having a null reference exception whenever it tries to delete the node. , Why don't you change your xpath to this:
code :
InstalledList.SelectSingleNode(string.Format("/packages/installed/sampleapp [@title='{0}']", uninstallernodename));
InstalledList.SelectSingleNode(string.Format("/packages/installed/* [@title='{0}']", uninstallernodename));
        XmlNode node = doc.SelectSingleNode(xpath);

        XmlNode parent = node.ParentNode;
        parent.RemoveChild(node);
PHP, XPath and SimpleXML - XPath not working

PHP, XPath and SimpleXML - XPath not working


By : Panchakshari RS
Date : March 29 2020, 07:55 AM
I think the issue was by ths following , I have the following PHP and XML: , See the below:
code :
// name only
$name = $simpleXmlEle->xpath("./item[1]/name");
echo $name[0], PHP_EOL;

// id only
$id = $simpleXmlEle->xpath("./item[2]/@id");
echo $id[0], PHP_EOL;
Array ( [0] => SimpleXMLElement Object ( [0] => Item A ) )
Array ( [0] => SimpleXMLElement Object ( [@attributes] => Array ( [id] => 34 ) ) )
print_r($objSimpleXML->xpath("//item[1]/name"));
XPath query working in XPath tester, but not in VB.NET

XPath query working in XPath tester, but not in VB.NET


By : PatSaunders
Date : March 29 2020, 07:55 AM
I hope this helps . It isn't clear how you did the test in XPath tester (or what exactly the XPath expression you tested), but I think your code is fair to fail because it is trying to get node having path configuration -> Status -> Status -> ElementOne which clearly doesn't exist :
code :
Dim xmlNode As XmlElement = TryCast(doc.SelectSingleNode("/configuration/Status"), XmlElement)
Dim xpath = "/Status/ElementOne[@ID='1234']"
Dim xpath = "ElementOne[@ID='1234']"
Dim xpath = "./ElementOne[@ID='1234']"
Dim xmlNode As XmlElement = doc.SelectSingleNode("/configuration/Status/ElementOne[@ID='1234']")
XPath expression for javax.xml.xpath not working

XPath expression for javax.xml.xpath not working


By : loradorado
Date : March 29 2020, 07:55 AM
I hope this helps you . to VGR I was able to get to know the problem. The website, where those Xpath expressions were not working, was a namespace aware website with a html tag constructed like this:
As I am using HtmlCleaner, I used the following code:
code :
HtmlCleaner cleaner = new HtmlCleaner();
CleanerProperties props = cleaner.getProperties();
props.setNamespacesAware(false);
TagNode mainNode = cleaner.clean(htmlString);
public TagNode removeNamespaceFromHtmlTag(TagNode htmlNode) {
    htmlNode.removeAttribute("xmlns");
    return htmlNode;
}
Xpath is not working with XML::Twig::XPath::Elt

Xpath is not working with XML::Twig::XPath::Elt


By : 李文祥
Date : March 29 2020, 07:55 AM
I hope this helps you . The //ChildB/@key xpath expression means that it starts at the root element and looks in any element for an element ChildB and the attribute @key.
It's confusing that your twig $constraint[0] is not completely taken out of the tree. It's like a view on some part of the full document tree, so the // actually looks in the full tree. It starts at root of the document, not at the element.
code :
#                                     V
my $child_key = $constraint[0]->find('.//ChildB/@key');
Key2
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